histogram with variable bin width

Use D3.js to sort in ascending & descending order, utilizing JS Objects.

HTML

<script src="http://d3js.org/d3.v3.min.js"></script>
<body>
</body>

CSS

body {
  font: 10px sans-serif;
}

.bar rect {
  fill: steelblue;
  shape-rendering: crispEdges;
}

.bar text {
  fill: #fff;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

JavaScript

// Generate a Bates distribution of 10 random variables.
var values = d3.range(100).map(d3.random.bates(10));

// A formatter for counts.
var formatCount = d3.format(",.0f");

var margin = {
    top: 10,
    right: 30,
    bottom: 30,
    left: 30
  },
  width = 960 - margin.left - margin.right,
  height = 500 - margin.top - margin.bottom;

var x = d3.scale.linear()
  .domain([0, 1])
  .range([0, width]);

// Generate a histogram using twenty uniformly-spaced bins.
var data = d3.layout.histogram()
  .bins(x.ticks(20))
  (values);

var y = d3.scale.linear()
  .domain([0, d3.max(data, function(d) {
    return d.y;
  })])
  .range([height, 0]);

var xAxis = d3.svg.axis()
  .scale(x)
  .orient("bottom");

var svg = d3.select("body").append("svg")
  .attr("width", width + margin.left + margin.right)
  .attr("height", height + margin.top + margin.bottom)
  .append("g")
  .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var bar = svg.selectAll(".bar")
  .data(data)
  .enter().append("g")
  .attr("class", "bar")
  .attr("transform", function(d) {
    return "translate(" + x(d.x) + "," + y(d.y) + ")";
  });

//x(data[0].dx) - 1
var widths = [1, 4, 5, 7, 9];
var i = 0;
bar.append("rect")
  .attr("x", 1)
  .attr("width", function(d) {
    console.log((height - y(d.y)) / 1000);
    return 30 + 20 * ((height - y(d.y)) / 1000);
  })
  .attr("height", function(d) {
    return height - y(d.y);
  });

bar.append("text")
  .attr("dy", ".75em")
  .attr("y", 6)
  .attr("x", x(data[0].dx) / 2)
  .attr("text-anchor", "middle")
  .text(function(d) {
    return formatCount(d.y);
  });

svg.append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis);


/*
//alert(x(data[0].dx) - 1)
bar.append("rect")
    .attr("x", 1)
    .attr("width", 50)
    .attr("height", function(d) { return height - y(d.y); })
    .attr("transform", "translate(" + (width) + ",0)");


svg.append("g")
    .attr("class", "y axis")
   ...